Honeywell T874 Product Data page 63

Model Fig.
Number No.
H1021 74 Obsolete. Friedrich Climate Master logo; part no.
AT5821; °F/°C scaleplate; used with Q674C1041.
H1039 79 Obsolete. Mammoth logo; °F/°C scaleplate; used with
Q674C1124; used in Y594H1004.
H1054 74 Obsolete. No logo; Friedrich part no. AT5854; used with
Q674C1041.
H1062 164 Honeywell logo; used with Q674C1249; used in
Y594H1012.
H1070 172, Obsolete. Carrier Heat Pump System Control logo; part
173 no. HH07AT166; °C scaleplate; used with Q674B1406
(HH93AZ200) or Q674C1322 (HH93AZ199).
H1088 172, Obsolete. Carrier Heat Pump System Control logo; part
173 no. HH07AT167; used with Q674B1406 (HH93AZ200)
or Q674C1322 (HH93AZ199).
H1096 177 Obsolete. Mammoth Water Source Heat Pump logo; °F/
°C scaleplate; changeover stage 0.8A maximum; used B
or O terminal; used with Q674C1330.
H1112 74 No logo; Friedrich part no. AT5812; used with
Q674C1355.
H1120 205 Obsolete. Command Aire logo; part no. P1013-0055;
used with Q674C1389, C1397.
H1138 221 Obsolete. Climate Master logo; part no. AT5838; used
with Q674C1470.
H1146 205 Trane logo; part no. X13510598010.
H1153 173 Obsolete. Carrier Heat Pump System Control logo; part
no. HH07AT167; °F/°C scaleplate; used with
Q674C1322; used in Y594H1053.
H1161 74 Obsolete. Carrier Heat Pump System Control logo; part
no. HH07AT203; °F/°C scaleplate; used with
Q674C1496; used in Y594H1038.
T874J Heat pump model. 2-stage heat, 1-stage cool.
J1002 124, Obsolete. Carrier Heat Pump System Control logo; part
144, no. HH07AT175; used with Q674J1068 (HH93AZ183),
206, Q674J1159 (HH93AZ196), Q674L1074 (HH93AZ186),
207 Q674L1637 (HH93AZ195).
J1010 124, Obsolete. BDP multi logo; part no. 34427DP124/P272-
171 2471; used with Q674J1084, L1371.
J1028 124, Obsolete. Carrier Heat Pump System Control logo; part
144, no. HH07AT165; °C scaleplate; used with Q674J1068
206, (HH93AZ183), Q674J1159 (HH93AZ196), Q674L1074
207 (HH93AZ186), Q674L1637 (HH93AZ195).
J1036 124, Obsolete. Miller logo; part no. 9132230; used with
171 Q674J1217.
J1044 124, Obsolete. Intertherm logo; part no. 9132240; used with
171 Q674J1217.
J1051 124, Obsolete. Carrier logo; part no. HH07AT165-W; Premier
144 White® color; °C scaleplate.
a
Both the thermostat and subbase must be replaced.
T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
Table 8. T874 Cross Reference.
Description
63
Trade Model
Replacement
Wiring differences (old=new):
Y594H1012 a
Y1=O, Y2=Y; L-R jumper
required; replacement has °F
scaleplate.
Wiring differences (old=new):
Y594H1012 a
R1=R, R2=L.
Wiring differences (old=new):
Y594H1012
a
Y1=O, Y2=Y; L-R jumper
required.
Y594H1012
a
None See subbase description for
replacement information.
None See subbase description for
replacement information.
Wiring differences (old=new):
Y594H1012
a
R1=R, R2=L; L-R jumper
required.
Wiring differences (old=new):
Y594H1012 a
Y1=O, Y2=Y; L-R jumper
required.
Wiring differences (old=new):
Y594H1012 a
Y1=O, Y2=Y.
Wiring differences (old=new):
Y594H1012
a
Y1=O, Y2=Y; replacement has
MALFUNCTION LED only.
Wiring differences (old=new):
Y594H1012 a
Y1=O, Y2=Y.
None See subbase description for
replacement information.
Wiring differences (old=new):
Y594H1012 a
Y1=O, Y2=Y; L-R jumper
required.
None See subbase description for
replacement information.
None See subbase description for
replacement information.
None See subbase description for
replacement information.
T8511G1021
T8511G1021
None See subbase description for
replacement information.
Remarks
60-2485—8